On Feb 10, 2008 2:55 PM, Paul J R
Now, i know if i overload the threadcontroller class in B it'd solve all my problems, but the real threadcontroller method is alot more complex and class A has about 6 sub classes so replicating the threadcontroller in each of the classes would be a little tedious.
Have i stumbled across a bug, or is that how its supposed to work?
A *mea = factory(); mea->worker(); thre.create_thread(*mea); I think if you dereference a variable of type A* you get, and will always get, an object of type A. At compile-time the compiler won't know whether the A* will point to an A or B, which doesn't matter with
That's how it's supposed to work; in A::threadcontroller(): pointer/reference semantics but does matter when the *object* is being passed as the compiler must know how much stack space to reserve for it. In this case it only knows to reserve enough for an A instance. I think you may have to define a method in A and B, similar to this: virtual void spawn(boost::thread_group& thre, A* worker) { thre.create_thread(worker); } Override it in B but it should then take a B* not A*. There may be a better way but this is what sprung to mind first off. HTH --rob